<!DOCTYPE html>
<html>
<head>
<title>下拉菜单实例|菜鸟教程(runoob.com)</title>
<meta charset="utf-8">
<style>
ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float:left
}

li a, .dropbtn {
    display: inline-block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover, .dropdown:hover, .dropbtn {
    background-color: #111;
}
.dropdown {
    display: inline-block;
}
.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}
.dropdown-content a:hover {
    background-color: #f1f1f1;
}
.dropdown:hover .dropdown-content {
    display: block;
}
</style>
</head>
<body>
<ul>
    <li><a class="active" href="#home">主页</a></li>
    <li><a href="#news">新闻</a></li>
    <div class="dropdown">
        <a href="#" class="dropbtn">下拉菜单</a>
        <div class="dropdown-content">
            <a href="#">链接1</a>
            <a href="#">链接2</a>
            <a href="#">链接3</a>
            
        </div>
        </div>
        </ul>
        <h3>导航栏上的下拉菜单</h3>
        <p>鼠标移动到“下拉菜单"链接先显示下拉菜单。</p>
</body>
</html>
